705985 has 16 divisors (see below), whose sum is σ = 1011456. Its totient is φ = 462528.

The previous prime is 705973. The next prime is 705989. The reversal of 705985 is 589507.

It is a cyclic number.

It is not a de Polignac number, because 705985 - 2¹⁷ = 574913 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 705985.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367 + ... + 1243.

It is an arithmetic number, because the mean of its divisors is an integer number (63216).

2⁷⁰⁵⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

705985 is a deficient number, since it is larger than the sum of its proper divisors (305471).

705985 is a wasteful number, since it uses less digits than its factorization.

705985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 705985 is about 840.2291354149. The cubic root of 705985 is about 89.0427350210.

The spelling of 705985 in words is "seven hundred five thousand, nine hundred eighty-five".